Accession Number:

ADA200120

Title:

Microstructure, Porosity and Mechanical Property Relationships of Calcium -Silicate-Hydrate

Descriptive Note:

Annual rept. 15 Dec 1987-14 May 1988

Corporate Author:

PENNSYLVANIA STATE UNIV UNIVERSITY PARK MATERIALS RESEARCH LAB

Report Date:

1988-08-15

Pagination or Media Count:

37.0

Abstract:

It is well known that characteristics of hydrated calcium aluminosilicate materials macrodefect-free, silica-enriched cement are directly related to the bulk composition of the starting materials which dictate the phases developing during the hydration process. Although countless examples of this empirical relationship can be found in the literature, very little in terms of a systematic study of phase, morphology, and intrinsic property relations are actually available. At this time, seven glasses will serve as simplified starting materials for ongoing solution and paste hydration studies. The experiments will provide insight into kinetics of reaction, phase development and microstructure paralleling that which occurs in high-strength construction materials such as structural concrete and other less traditional chemically bonded ceramics. Our objectives is to begin to understand the nature of microstructure, porosity and mechanical property relationships of calcium silicate hydrate and its coexisting phases. By delineating phase relations among these largely amorphous, gel-like materials it may then be possible to engineer these materials for a variety of purposes. For example, using simple hydration and low temperature processing, it may be possible to produce low-cost nanometer composite materials which may prove to be stronger and more durable than the more conventional portland cement-based materials now available.

Subject Categories:

  • Physical Chemistry
  • Ceramics, Refractories and Glass
  • Construction Equipment, Materials and Supplies

Distribution Statement:

APPROVED FOR PUBLIC RELEASE